Merge branch 'hn/branch-push-slip-advice' into next

When 'git push origin/main' or 'git branch origin main' is run, the command is now recognized as a potential typo, and advice has been added to offer a typofix. * hn/branch-push-slip-advice: push: suggest <remote> <branch> for a slash slip branch: suggest <remote>/<branch> on upstream slip